analytics/informix/extend/TimeSeries.6.00.FC8/examples/nelems.c

/*
 * Licensed Materials - Property of HCL
 *
 * IBM Informix  DataBlade Module
 * (C) Copyright International Business Machines Corporation 2002.
 * (c) Copyright HCL Technologies Ltd. 2017.  All Rights Reserved.
 *
 * COPYRIGHT LICENSE: 
 * This information contains sample application programs in source language,
 * which illustrate programming techniques on various operating platforms.
 * You may copy, modify, and distribute these sample programs in any form
 * without payment to IBM, for the purposes of developing, using, marketing 
 * or distributing application programs conforming to the application 
 * programming interface for the operating platform for which the sample 
 * programs are written. These examples have not been thoroughly tested under 
 * all conditions. IBM, therefore, cannot guarantee or imply reliability, 
 * serviceability, or function of these programs. You may copy, modify, and 
 * distribute these sample programs in any form without payment to IBM for 
 * the purposes of developing, using, marketing, or distributing application 
 * programs conforming to IBM's application programming interfaces. 
 * Each copy or any portion of these sample programs or any derivative work, 
 * must include a copyright notice as follows: 
 * © (your company name) (year). Portions of this code are derived from 
 * IBM Corp. Sample Programs. © Copyright IBM Corp. (enter the year or 
 * years). All rights reserved. 
 *
 */

#include "tseries.h"

/*
 * Example of counting non null elements
 */
mi_integer
nelems(ts_timeseries *ts, MI_FPARAM *fParam)
{
    ts_tsdesc   *tsdesc;
    ts_tscan    *tsscan;
    ts_tselem    elem;
    mi_integer	 cnt;
    mi_integer	 ret;
    MI_CONNECTION *conn;

    conn = mi_open(NULL, NULL, NULL);

    /* open the source timeseries */
    cnt = 0;
    tsdesc = ts_open(conn, ts, mi_fp_argtype(fParam, 0), 0);

    /* scan the entire timeseries */
    tsscan = ts_begin_scan(tsdesc, 0, NULL, NULL);
    while ((ret = ts_next(tsscan, &elem)) != TS_SCAN_EOS)
        if (ret != TS_SCAN_NULL)
	    /* don't count nulls */
            cnt++;

    /* clean up */
    ts_end_scan(tsscan);

    ts_close(tsdesc);

    return(cnt);
}